Fuel-saving device for heaters



Jan. 9, 1923..

H. B. MAYNARD, SR. FUEL sAvlNG DEVICE FOR HEATERS.

FILED NOV. 21, |921.

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A TTUR/VEl/S lllliittentedl mlan.u de

i unipi im it uaiaorin n; Marianen, en., rrnur ironia.

Application filed INovember 21, 1921.

To all w hom t may concer/1t lie it known that l, llnnoiyn B. lil/limitano) described lor use in connection,with gas heaters or stoves..

llt the pi sent tirne there 'is a considerable waste ot luel, especially in gas stoves or heat'erswhen employed ttor coolriiig7 ironing, or like purposes, due to the if( .ure of the user to cut down the llow oli the gas or lfuel upon rei'iloval oi? the utensil, ironj or other similar articles trom the stove. 'this ilailure mainly due to the trouble incident to niaiuially cutting down the flow of the ,das and the iiossnliil'ilLj,Y olf turning the salue too low.

lt is thcrelore un object ol the present in intiou to provide a means associated with the stove or heater which is operable by the weight olf the utensil or other article to be heated Vwhen arranged on the stove7 to ell'ect the liull ilow of gas to the burner, Vwhich means is autoinaticallyf operable upon re-A rrioval oil? the article or utensil7L to ellect a substantial pre(leteriuinedi reduction in thc l'low ol: the gas to the burner whereby to overcome the above recited objections.

ils a 'further object, the iiiiveution conten'iplatee a device for controlling the l'low olf tuel to 'the burner olv heater o stove operable by the Weight of the article to be heated, which device includes means of adjustment Wherebj,7 the ininiuiuni flow oit' the Ytuel when the heater is not in active use may be regulated.

4.5 ls l Afurther object the invention aims to produce a device ol' the character described `which Vis extremely simple in its construetion., inexpeusve to nianuliacture, and which is thoroughly reliable and highly ellicient in its purpose.

lllith the abete recited and other objects in `View, the invention resides in the novel construction set liorth in the ollowini@Y speci- 'iicatioin iriarticularly pointed out in the appended claims and illustrated in the acconii panying drawings, it beinicy understood that Serial No. 515,630.

the :right is reserved to embodiments other than those actually illustrated herein to the lull extent indicated by the general incaning` of the terins in which the claims are eX- pressed.

ln the drawing- Figure l is a sectional 'View through a gas heater or store equipped with a regulating' device. constructed in accordance with the invention.

lig .is a plan 'View of the stove.

lhclearing to the ndra-Wlngs by characters otretere'l'ice, l0 designates a stove top provided with supporting legs ll dependin' thereitroni and a burner l2 supported be heath the central aperture 13 in the top and over which aperture the usual burner plate is arranged. rlFhe burner plate is loosely fitted Within arecess l5 coinrnunicatingbi` with the aperture 13 and-is retained against lateral displacement by depending guide lugs lp received b y the apertures t? .in the top il). l' y this aril'aingelnent the burner plate la is capable oli `relative Vvertical movements with respect to the top l0. l`he burner .l2 has couununication` with a mining; chamber i8 which in turn coninrunirates with the tuel leed pipe l) through the aligned apertures 2() in a valve chamber 2l interposed between the inner end ol` the 'i'uelv vleed pipe lll and the mixingi chamber it. 'lhe outer end ot the tuel 'toed supply pipe 19 is provided with the usual valued nipple 22 which is et tached to a suitable source of fuel supply. 'llhe controlliun` valve consists of a stein Q3 having a trimsrerse aperture 2li in the lower extremity thereo'liywliich lower extreniit",r is Vvertically` adjustable in the 'valve chaniber 2l. The upper extremity oit the stein 2B extends vertically troni the valve chamber 2l and engages the under side ot the `-lor- Ward edge of the burner plate in'iinediately in raar oi the `foremost guide lug le, the said upper titreniittT ot the stein protruding through a Lguide opening); 25 in the recessed portion ot the top l0. The intermediate portion ot the stein 223 is threaded as at 3U and has n'iounted thereon upper and lower .nuts 27 and 28. A suitable packing ring` is arranged on the stein directly over the upper end ol the valve chamber .0l and a coiled contractile spring' 30 is interp sed between the louer .nut Q8 and the packing ring; to norinalhVT etlect upward movement ot the stein. The upper nut 2T constitutes an adjustable abutn'ieut 'tor limiting' the upward lll() llt) movement of the stem under the action of the spring 30 by its coacting engagement with the under side of the recessed portion of the stove top 10. By properly regulating the upper nut 27, the engagement of the same with the under side of the stove top restricts the amount of fuel passing through the aligned apertures 2O and the transverse aperture 241@ in the valve stem. At the same time the upper extremity of the stem under the action of the spring constitutes a means for normally elevating the forward end of the burner plate whereby upon the absence of an article on the burner plate said burner plate will be normally elevated.

In use and operation, when an article is placed on the burner plate the weight of the same will depress the stem against the action of the spring 30 thereby bringing the transverse aperture 24 in axial alignment with the aligned apertures 20 to permit an unrestricted liow of the fuel from the fuel feed pipe 19 to the mixing chamber and thence to the burner to permit a full flow or llame therefrom. llVhen the article is removed from the burner pla-teit is obvious that the tension of the spring will automatically effeet an upward movement of the stem and the burner plate to cause the apertured portion of the stern to partially restrict the flow of the fuel through the aligned apertures 20, thus cutting down the .flame while the stove is not iny actual use. Then the tension of the spring 30 through continuous use is reduced, said tension may be increased by advancing the lower nut 28 toward the lower end of the stem. The upper nut 27 may be raised or lowered when desired for the purpose of increasing or decreasing the minimum flow of the fuel through the apertures to provide a regulating means.

I cla-im:

l. In a device of the character described, the combination with a gas stove or heater including a burner, a vertically movable burner plate thereover for supporting the article to be heated and a fuel supply, of a valve interposed between the burner intake and the fuel supply oon'lprising a valve chamber having aligned apertures, a vertically movable stem having its lower end arranged within said valve chamber and its upper end engaging the under side of the burner plate, the lower end of said stem having an aperture designed to wholly regyister with the aligned apertures in the 'valve chamber when the stem. is in its rlowermost position, an intermediate threaded portion on said stem, an upper nut arranged on said threaded portion for adjustable engagement` with the under side of the stove top whereby to limit the elevation of the stein to dispose the aperture in the ,stem in partial alignment with the aligned apertures in the valve chamber, a lower nut on the threaded. portion of the stem, and a. coiled contractile spring interposed between said nut and the upper end of the valve chamber.

2. A gas heater or stove comln'ising a burner having an intake pipe for connection with a source of fuel supply, a valve chanw ber in said intake valve having aligned apertures, a valve consisting ol a stem having an apertured lower end litt/ed in the valve chamber and a threaded upper end extending above the valve chamber, a stove top having an aperture through Vwhich the upper end of the valve extends, a vertically morable burner plate on the stove top resting upon the upper end of the val\e, a nut longitudinally adjustable on the threaded portion of the stem to provide an alnltuient eugageable with the under side of the stove top, a second nut on the threaded portion of the stem, and a spring interposed between the second nut and the upper end ol the valve chamber for normally effecting upward movement and abutting engagement of the lirst nut with the under side of the stove top, the said apertured lower end el the stem being adapted to partially register with the apertures in the valve chamber when the stein is thrust upwardlv b v the spring and adapted to wholly uncover the apertures in the valve chamber when lowered, as and for the purpose speeilied.

HAROLD B. MAYNUD, Sn. 

